Proceedings of the 6th Nordic Signal Processing Symposium, 2004. NORSIG 2004., 2004
In this paper we investigate adaptive closed-loop power control algorithms based on the Generaliz... more In this paper we investigate adaptive closed-loop power control algorithms based on the Generalized Predictive Control (GPC) method that are able to alleviate the effect of the loop delay inherent in the closed-loop power control of DS-CDMA systems, even if the loop delay is unknown. The numerical results indicate that the GPCbased algorithms can significantly improve the radio network capacity without any increase in power control signaling, even with unknown loop delay.
The segmentation algorithm, which separates the heart sound signal into four parts: the first hea... more The segmentation algorithm, which separates the heart sound signal into four parts: the first heart sound, the systole, the second heart sound and the diastole, is developed. The segmentation of phonocardiogram signal is the first step of analysis and the most important procedure in the automatic diagnosis of heart sounds. This algorithm is based on the normalized average Shannon energy of PCG signal. The performance of the algorithm has been evaluated using 515 periods of PCG signal recording from 37 objects including normal and abnormal. The algorithm has shown 93 percent correct ratio. 1.
... Fig.2 Shows an original PCG signal , which is one of the recordings, and it's normalized... more ... Fig.2 Shows an original PCG signal , which is one of the recordings, and it's normalized average Shannon energy and a ... Address for correspondence: Liang.Huiying@hut.fi Helsinki University of Technology, Signal Processing and Computer Technology Laboratory POBox 3000 ...
An approach for evaluating the performance of parallel implementations of algorithms is presented... more An approach for evaluating the performance of parallel implementations of algorithms is presented. The scope is limited to data value independent computations and processor network architectures. DFT implementations are analyzed as examples. 4 references.
The data flow principle has recently been introduced for a digital signal processor architecture.... more The data flow principle has recently been introduced for a digital signal processor architecture. The control functions of a data flow computer are application independent and suitable for VLSI implementation. This paper discusses the functional details of the flow control section resulting in module specifications of a control chip. Finally a preliminary layout of the control chip is given. 10 references.
Abstract An efficient systolic array for performing least squares computations is described. It i... more Abstract An efficient systolic array for performing least squares computations is described. It implements the orthogonal-inverse updating algorithm to update the inverse Cholesky factor R-1, by applying the same sequence of orthogonal transformations that has previously been used to update R. The present implementation avoids doubling of hardware requirements, using only one triangular array. The entire structure is fully pipelined and the updates are nicely successive.
... Thls will be a topic for future research. ACKNOWLEDGMENTS We would like to thank Jarno Tanska... more ... Thls will be a topic for future research. ACKNOWLEDGMENTS We would like to thank Jarno Tanskanen, Juha Karhunen and Jyrki Joutsensalo from Helsinki University of Technology for helpful discussions. ... Indianapolis, IN: Howard W. Sams & Co., 1986. ...
ICASSP '83. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2000
Recursive computation can be used to generate sine waveforms. The waveforms are degraded by the r... more Recursive computation can be used to generate sine waveforms. The waveforms are degraded by the round-off noise caused by rounding the results of multiplications. The variance of the round-off noise will increase during the computation if white noise model is assumed. However, in certain cases this will not happen. In this paper the so called 'locking' phenomenon is described. A measure is given to the locking sensitivity of a certain algorithm. Some results of computer simulations and hardware measurements are also given.
Proceedings of the 6th Nordic Signal Processing Symposium, 2004. NORSIG 2004., 2004
In this paper we investigate adaptive closed-loop power control algorithms based on the Generaliz... more In this paper we investigate adaptive closed-loop power control algorithms based on the Generalized Predictive Control (GPC) method that are able to alleviate the effect of the loop delay inherent in the closed-loop power control of DS-CDMA systems, even if the loop delay is unknown. The numerical results indicate that the GPCbased algorithms can significantly improve the radio network capacity without any increase in power control signaling, even with unknown loop delay.
The segmentation algorithm, which separates the heart sound signal into four parts: the first hea... more The segmentation algorithm, which separates the heart sound signal into four parts: the first heart sound, the systole, the second heart sound and the diastole, is developed. The segmentation of phonocardiogram signal is the first step of analysis and the most important procedure in the automatic diagnosis of heart sounds. This algorithm is based on the normalized average Shannon energy of PCG signal. The performance of the algorithm has been evaluated using 515 periods of PCG signal recording from 37 objects including normal and abnormal. The algorithm has shown 93 percent correct ratio. 1.
... Fig.2 Shows an original PCG signal , which is one of the recordings, and it's normalized... more ... Fig.2 Shows an original PCG signal , which is one of the recordings, and it's normalized average Shannon energy and a ... Address for correspondence: Liang.Huiying@hut.fi Helsinki University of Technology, Signal Processing and Computer Technology Laboratory POBox 3000 ...
An approach for evaluating the performance of parallel implementations of algorithms is presented... more An approach for evaluating the performance of parallel implementations of algorithms is presented. The scope is limited to data value independent computations and processor network architectures. DFT implementations are analyzed as examples. 4 references.
The data flow principle has recently been introduced for a digital signal processor architecture.... more The data flow principle has recently been introduced for a digital signal processor architecture. The control functions of a data flow computer are application independent and suitable for VLSI implementation. This paper discusses the functional details of the flow control section resulting in module specifications of a control chip. Finally a preliminary layout of the control chip is given. 10 references.
Abstract An efficient systolic array for performing least squares computations is described. It i... more Abstract An efficient systolic array for performing least squares computations is described. It implements the orthogonal-inverse updating algorithm to update the inverse Cholesky factor R-1, by applying the same sequence of orthogonal transformations that has previously been used to update R. The present implementation avoids doubling of hardware requirements, using only one triangular array. The entire structure is fully pipelined and the updates are nicely successive.
... Thls will be a topic for future research. ACKNOWLEDGMENTS We would like to thank Jarno Tanska... more ... Thls will be a topic for future research. ACKNOWLEDGMENTS We would like to thank Jarno Tanskanen, Juha Karhunen and Jyrki Joutsensalo from Helsinki University of Technology for helpful discussions. ... Indianapolis, IN: Howard W. Sams & Co., 1986. ...
ICASSP '83. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2000
Recursive computation can be used to generate sine waveforms. The waveforms are degraded by the r... more Recursive computation can be used to generate sine waveforms. The waveforms are degraded by the round-off noise caused by rounding the results of multiplications. The variance of the round-off noise will increase during the computation if white noise model is assumed. However, in certain cases this will not happen. In this paper the so called 'locking' phenomenon is described. A measure is given to the locking sensitivity of a certain algorithm. Some results of computer simulations and hardware measurements are also given.
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